Observed issues › fuzz/b3-9-afar
amdflang: "verification of lowering to FIR failed" for nontemporal on an assumed-shape dummy
Legality: not independently confirmed. no independent review yet How this is checked
Same issue as afar-nontemporal-assumed-shape-ice; this program is another reproducer of it.
Affected variants
| Compiler | MI300A gfx942 unified memory (XNACK 1) | MI300A gfx942 copy (XNACK 0) | MI250X gfx90a copy (XNACK 0) | MI300X gfx942 copy (XNACK 0) | MI350X gfx950 copy (XNACK 0) | A100 sm_80 separate memory | A100 sm_80 managed memory |
|---|---|---|---|---|---|---|---|
| AFAR 24.3.0 | behaves incorrectly | behaves incorrectly | unknown not run | behaves incorrectly | behaves incorrectly | n/a | n/a |
| CCE 19.0.0 | correct | correct | unknown not run | unknown not run | unknown not run | n/a | n/a |
| CCE 20.0.2 | correct | correct | unknown not run | unknown not run | unknown not run | n/a | n/a |
| CCE 21.0.3 | correct | correct | unknown not run | unknown not run | unknown not run | n/a | n/a |
| CCE 21.0.4 | correct | correct | unknown not run | unknown not run | unknown not run | n/a | n/a |
| NVHPC 25.11 | n/a | n/a | n/a | n/a | n/a | fails another way | fails another way |
| NVHPC 26.9 | n/a | n/a | n/a | n/a | n/a | fails another way | fails another way |
| GCC 16.2.0 | correct | correct | correct | correct | correct | correct | n/a |
"behaves incorrectly" / "not supported": this issue, confirmed in up to four environments (another build directory, another node, a repeat). "fails another way": a different failure, not counted as this issue. "unknown": not run there, or the runs disagree.
Messages
| Result | Compiler and GPU | Message |
|---|---|---|
| behaves incorrectly | AFAR 24.3.0, MI300A unified AFAR 24.3.0, MI300A copy AFAR 24.3.0, MI300X AFAR 24.3.0, MI350X | showerror: loc("fuzz-b3-9-afar.f90":68:13): 'omp.simd' op operand #0 must be variadic of OpenMP-compatible variable type, but got '!fir.box<!fir.array<?x?xi32>>'
error: verification of lowering to FIR failed |
| fails another way | NVHPC 25.11, A100 separate NVHPC 25.11, A100 managed | showNVFORTRAN-S-0034-Syntax error at or near identifier nontemporal (fuzz-b3-9-afar.f90: 68) NVFORTRAN/x86-64 Linux 25.11-0: compilation completed with severe errors |
| fails another way | NVHPC 26.9, A100 separate NVHPC 26.9, A100 managed | showNVFORTRAN-S-0034-Syntax error at or near identifier nontemporal (fuzz-b3-9-afar.f90: 68) NVFORTRAN/x86-64 Linux 26.9-0: compilation completed with severe errors |
Reproduce
AFAR 24.3.0, MI300A unified
$AFAR/bin/amdflang -fopenmp --offload-arch=gfx942 -O2 repro.f90 -o repro HSA_XNACK=1 OMP_TARGET_OFFLOAD=mandatory ./repro
CCE 19.0.0, MI300A unified (runs correctly)
module load cce/19.0.0 craype-accel-amd-gfx942 rocm/6.4.3 module unload cray-mpich ftn -fopenmp -O2 repro.f90 -o repro HSA_XNACK=1 OMP_TARGET_OFFLOAD=mandatory ./repro
Program (96 lines)
! Minimized by compliance.fuzz_min from fuzz seed 9 (fuzz-3).
! toolchain: afar (-O2, HSA_XNACK=1, OMP_TARGET_OFFLOAD=mandatory)
! failure: ice (afar FIR verification: 'omp.simd' op operand #0 must be variadic of OpenMP-compatible variable type, but got
! '!fir.box<!fir.array<?x?xi32>>')
! expected: compiles
! observed: internal compiler error: ice: error: verification of lowering to FIR failed
! Legal OpenMP 5.2: offload.engine.rules accepts it (offload.engine.prerun.check, rerun: with the
! race rule and the restriction checks); NVHPC is no witness: it rejects it
! (NVFORTRAN-S-0034-Syntax error at or near identifier nontemporal); the
! check's other witness, the AFAR flang front end, is the compiler under test and is not counted;
! no gfortran or gcc is a legality witness.
program fuzz_prog
use omp_lib, only: omp_get_default_device, omp_is_initial_device
implicit none
integer, parameter :: n = 200, m = 8
type :: rec_t
integer :: a(n)
integer, allocatable :: q(:)
integer, pointer :: pc(:)
end type rec_t
type(rec_t) :: dr
integer, allocatable, target :: ia(:)
integer :: ib(n)
integer, allocatable :: ic(:, :)
integer, pointer :: o1(:, :)
integer, pointer :: o2(:)
integer, target :: o1t(n, m)
integer, target :: o2t(n)
integer :: i, j, r1a, r1b, hf1, r2a, dev
integer(8) :: cs
allocate(ia(n))
allocate(ic(n, m))
allocate(dr%q(n))
o1 => o1t
o2 => o2t
do i = 1, n
ia(i) = mod(i * 4 + 15, 1009) - 376
end do
do i = 1, n
ib(i) = mod(i * 3 + 7, 30011) - 3238
end do
do j = 1, m
do i = 1, n
ic(i, j) = mod((i + 1 * j) * 60 + 5, 101) - 34
end do
end do
do i = 1, n
dr%a(i) = mod(i * 35 + 38, 97) - 36
dr%q(i) = mod(i * 10 + 45, 211) - 86
end do
o1 = 0
o2 = 0
r1a = 2
r1b = 3
hf1 = 0
r2a = 4
dev = omp_get_default_device()
! fuzz: kernels
! fuzz: checksum
cs = 0
cs = modulo(cs * 31_8 + int(r1a, 8), 2147483629_8)
cs = modulo(cs * 31_8 + int(r1b, 8), 2147483629_8)
do j = 1, m
do i = 1, n
cs = modulo(cs * 31_8 + int(o1t(i, j), 8), 2147483629_8)
end do
end do
cs = modulo(cs * 31_8 + int(r2a, 8), 2147483629_8)
do i = 1, n
cs = modulo(cs * 31_8 + int(o2t(i), 8), 2147483629_8)
end do
print '(a,i0,a,i0)', 'RESULT checksum=', cs, ' ran_on_host=', max(hf1, 0)
contains
subroutine kp1(ib, o1, dr, zopt)
integer, intent(in) :: ib(n)
integer, intent(inout) :: o1(:, :)
type(rec_t), intent(inout) :: dr
integer, intent(in), optional :: zopt(:)
!$omp target
do i = n, 1, -1
!$omp simd nontemporal(o1)
do j = m, 1, -1
end do
!$omp end simd
end do
!$omp end target
end subroutine kp1
subroutine kp2(ia, ib, ic, o2, dr, zopt)
integer, allocatable, intent(inout) :: ia(:)
integer, intent(in) :: ib(n)
integer, allocatable, intent(inout) :: ic(:, :)
integer, intent(inout) :: o2(:)
type(rec_t), intent(inout) :: dr
integer, intent(in), optional :: zopt(:)
end subroutine kp2
end program fuzz_prog
Something to add? Dispute its legality · Report it fixed in a newer release · Report a mistake on this page
Expected and observed
Observed where it behaves incorrectly
error: loc("fuzz-b3-9-afar.f90":68:13): 'omp.simd' op operand #0 must be variadic of OpenMP-compatible variable type, but got '!fir.box<!fir.array<?x?xi32>>'
error: verification of lowering to FIR failedWhat the specification requires
The specification text this program relies on and the compiler is expected to support.
The same requirement as the issue afar-nontemporal-assumed-shape-ice.
OpenMP 5.2 §10.4.1 p.236 l.21-22
The nontemporal clause specifies that accesses to the storage locations to which the list items refer have low temporal locality across the iterations in which those storage locations are accessed.
OpenMP 5.2 §10.4.1 p.236 l.23-24
The list items of the nontemporal clause may also appear as list items of data-environment attribute clauses.
Evidence
Other compilers run it correctly
CCE 19.0.0, CCE 20.0.2, CCE 21.0.3, CCE 21.0.4, GCC 16.2.0